Errors in Thinking and Irrational Beliefs Please read about psychologist Albert Ellis and his theory of irrational beliefs. Look over the list of the irrational beliefs and try to see what is their common element. Also, please study the concept of fallacies and compare it to the concept of irrational beliefs. There is some difference — can you find it? Irrational beliefs are certain types of deep-seated cognitive errors that people live by. Living by these cognitive errors can relate to all kinds of disorders, such as depression, among others, but all of us commit such errors to some degree. Discuss how these cognitive errors can adversely impact a person’s psychological wellbeing if they get out of hand. Discuss any of these that impact someone you know – or you — and the impact they have.